A186978 Number of ordered septuples of distinct pairwise coprime positive integers with largest element n.

6, 0, 0, 2, 56, 1, 219, 13, 27, 15, 777, 28, 640, 102, 563, 127, 3923, 28, 7859, 1792, 1505, 966, 2354, 392, 21313, 2289, 3969, 1344, 42828, 714, 69360, 7566, 8118, 8826, 122883, 5082, 93084, 10890, 33594, 19338, 266024, 11011, 82350, 23298, 63917

Offset: 13

Author

Alois P. Heinz, Mar 02 2011

Keywords

• nonn

Examples

			a(16) = 2 because there are 2 ordered septuples of distinct pairwise coprime positive integers with largest element 16: (1,3,5,7,11,13,16), (1,5,7,9,11,13,16).
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 13..200

Crossrefs

Column 7 of triangle A186972. First differences of A186983.